Welder Qualification vs. Welder Certification: The Audit-Day Difference

By Timothy Dodd AWS CWI #00120381 · ICC S2 #8184186

Published: May 15, 2026

Read time: ~10 minutes

The Two Words That Sound the Same But Aren't

If you spend any time around fabrication shops, you'll hear "certified welder" and "qualified welder" used interchangeably. Job postings ask for "certified welders." QC managers ask if the crew is "certified for the job." Welders themselves talk about getting "certified" when what they actually got was a test plate evaluation. In casual conversation, none of this is a problem — everyone roughly knows what's meant.

The problem is when this casual interchangeability collides with project documents, third-party inspections, and audit-day verification. In those settings, "welder qualification" and "welder certification" refer to two legally and contractually distinct documents — and showing up with the wrong one means production stoppage, paperwork chase, and potentially a rejected project.

The distinction is straightforward once you understand it, but virtually no one outside the inspection community gets walked through it. Here is what every QC manager, contractor, and welder should know.

What "Welder Qualification" Actually Means

Welder qualification refers to a Welder Performance Qualification (WPQ) record. The WPQ is the document virtually every welding project specification actually requires — even when the spec calls the welder "certified."

A WPQ is issued under a governing welding code. The most common codes are:

• AWS D1.1 — Structural Welding Code — Steel (the foundational code for structural steel buildings, bridges, equipment)
• ASME Section IX — Pressure piping and pressure vessel qualification
• API 1104 — Cross-country pipeline welder qualification
• AWWA C206 — Steel water pipe welding
• AWS D1.6 — Stainless steel structural welding
• AWS D1.3 — Sheet steel structural welding
• AWS D1.7 — Strengthening and repairing existing structures

Each code has its own requirements for how qualification testing is performed, what's documented, and what's signed off. But the structure of a WPQ is consistent: it's a record demonstrating that a specific named welder, on a specific date, produced a specific type of weld under specific conditions, and that the weld passed the prescribed inspection and mechanical testing.

What a WPQ Contains

A complete WPQ documents:

• Welder name and unique identification number
• Date of qualification (the date the test weld was made)
• Welding process used (SMAW, GMAW, FCAW, GTAW, or combination)
• Base metal grade and thickness, or pipe diameter and schedule
• Filler metal classification
• Test position (1G, 2G, 3G, 4G, 5G, 6G, etc.)
• Joint design and reference Welding Procedure Specification (WPS)
• CWI visual examination results per the governing code's acceptance criteria
• Mechanical test results — typically guided bend test specimens (face/root or side bends depending on thickness), or radiographic test results when RT is the qualifying method
• Range of qualification (what other positions, thicknesses, and processes are covered by this single test per the code's qualification tables)
• Signature of the AWS Certified Welding Inspector who oversaw the test

That last item is critical. A WPQ requires an AWS CWI signature to be valid. The CWI's name and certification number appear on the record. If the project owner or third-party inspector wants to verify, they can — by contacting AWS or by calling the CWI directly.

The Employer-Held Nature of a WPQ

One characteristic of a WPQ that surprises new QC managers: the WPQ belongs to the employer that paid for the test, not to the welder. This is sometimes called "employer-held qualification" or "company-specific qualification."

The reasoning is grounded in how welding codes treat the qualification act. The WPQ documents that the welder performed acceptable welds under a specific Welding Procedure Specification at a specific facility. When the welder changes employers, the new employer may or may not have an equivalent WPS, equivalent equipment, or equivalent quality program. The original WPQ does not automatically transfer.

In practice, a new employer may accept an existing WPQ as evidence of welder skill — but they are not required to. Many companies require welders to re-qualify under the new employer's WPS regardless of prior qualification history.

What "Welder Certification" Actually Means

"Welder certification," used in the precise technical sense, refers to the AWS Certified Welder program. This is a separate, parallel credentialing system administered directly by the American Welding Society under AWS QC7, Standard for AWS Certified Welder.

The AWS Certified Welder program is different from WPQ qualification in several important ways:

The AWS Certified Welder program has legitimate uses. Some employers value the portable credential when hiring welders who move between companies. Some specialized industries — production positions, traveling welders, certain shops — find the AWS card useful as a hiring filter. And some specifications do explicitly cite QC7.

But it is not the default credential most welding projects require. The default is a code-compliant WPQ.

Three Audit-Day Scenarios Where This Matters

The terminology distinction is academic right up until it costs someone real money. Here are three scenarios drawn from actual fabrication shop experiences.

The shops that get this right share one habit: they read the specification before they bid the work, and they re-read it before they submit credentials. The shops that get burned share another habit: they assume "certified welder" in a spec means whatever credential their welders happen to hold.

How to Read a Project Specification for Credential Requirements

The actual document you need is hiding in plain sight. When evaluating what credentials your welders need for a project, look for these specific clues in the specification.

Step 1: Find the Welding Code Citation

Project specifications almost always cite a governing welding code in the welding section. Common citations:

• "All welding shall conform to AWS D1.1, latest edition"
• "Pressure piping welding shall comply with ASME Section IX"
• "Pipeline welding shall be in accordance with API 1104"
• "Water main welding shall conform to AWWA C206"

If a welding code is cited, the welders need WPQ records under that code. Not a different code. Not an AWS Certified Welder card. The specific code named in the spec.

Step 2: Look for Explicit AWS QC7 Language

If the specification says any of the following, an AWS Certified Welder card may be required in addition to or instead of a WPQ:

• "Welders shall be AWS Certified per AWS QC7"
• "AWS Accredited Testing Facility credentials required"
• "Welders shall hold a current AWS Certified Welder card"

Without explicit QC7 language, the AWS Certified Welder card is not the required credential.

Step 3: Resolve Ambiguity in Writing

If the specification just says "certified welders" without citing AWS QC7 or a specific welding code — which happens more often than it should — the only correct action is to ask the engineer of record or owner's representative for written clarification before testing.

Email is acceptable. The clarification should specifically state which welding code governs and what type of credential (WPQ record or AWS Certified Welder card) is required. Save the response. Attach it to the welder credential package.

What WeldCertTest Issues — and What We Don't

WeldCertTest is operated by Xenogenesis, LLC in Alpharetta, Georgia. All CWI visual inspection is performed personally by Timothy Dodd, AWS CWI #00120381 and ICC S2 Structural Welding Inspector #8184186. The accredited bend testing for mechanical evaluation is performed at a separate accredited laboratory.

What WeldCertTest issues:

• Official WPQ records under AWS D1.1, ASME Section IX, API 1104, AWWA C206, AWS D1.6, AWS D1.3, and AWS D1.7
• CWI-signed documentation that satisfies project audit requirements under each code
• Range-of-qualification information so the WPQ can be applied to all positions and thicknesses the test covers

What WeldCertTest does not issue:

• AWS Certified Welder cards under AWS QC7 (this is the ATF program — WeldCertTest is not an AWS Accredited Testing Facility)
• Welding Procedure Specifications (WPS) — the WPS must be supplied by the customer or developed separately
• Code certifications outside the listed welding codes

For virtually all structural, pressure piping, pipeline, water works, stainless, sheet metal, and repair welding projects, the WPQ record is what the project specification actually requires. If a specification specifically calls for AWS QC7 / AWS Certified Welder credentials, the welder will need to test through an AWS ATF instead.

If you're not sure which document your project needs, call (404) 860-1288 or read the more detailed WPQ vs. AWS Certified Welder authority page. We've helped enough QC managers parse this exact question that we can usually identify what the spec actually requires from a five-minute conversation.

Frequently Asked Questions

About the Author

This article was written and reviewed by the same CWI who performs all visual inspection for WeldCertTest.

Timothy Dodd

AWS CWI #00120381 • ICC S2 #8184186

AWS Certified Welding Inspector and owner of Xenogenesis, LLC. Performs all CWI visual inspection for WeldCertTest welder qualification testing under AWS D1.1, ASME Section IX, API 1104, AWWA C206, D1.6, D1.3, and D1.7. Signs every WPQ issued.

Roger Baldwin

Site Owner & Operator

Owner and operator of WeldCertTest.com. 28 years in the broader nondestructive testing industry, including 20 years operating a ground-penetrating radar and NDT imaging company.